“If you aren't willing to own a stock for ten years, don't even think about owning ..... Warren Buffett

A lot of things happen in an economy which can effect the market within a period of time.

A stock that performed badly in one year could turn out to be the best performing stock in 3 to 5 years depending on the events that took place within that period.

Making a decision based on one year analysis could turn out to be the worst ever decision you have made.